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Sviatoslav Sydorenko 595413d113
Replace the inhouse collection dependency resolver with `resolvelib`
PR #72591

This change:

  * Adds an artifacts manager that abstracts away extracting the
    metadata from artifacts, downloading and caching them in a
    temporary location.

  * Adds `resolvelib` to direct ansible-core dependencies[0].

  * Implements a `resolvelib`-based dependency resolver for
    `collection` subcommands that replaces the legacy
    in-house code.

    This is a dependency resolution library that pip 20.3+ uses
    by default. It's now integrated for use for the collection
    dependency resolution in ansible-galaxy CLI.

  * Refactors of the `ansible-galaxy collection` CLI.
    In particular, it:

      - reimplements most of the `download`, `install`, `list` and
        `verify` subcommands from scratch;

      - reuses helper bits previously moved out into external modules;

      - replaces the old in-house resolver with a more clear
        implementation based on the resolvelib library[0][1][2].

  * Adds a multi Galaxy API proxy layer that abstracts accessing the
    version and dependencies via API or local artifacts manager.

  * Makes `GalaxyAPI` instances sortable.

  * Adds string representation methods to `GalaxyAPI`.

  * Adds dev representation to `GalaxyAPI`.

  * Removes unnecessary integration and unit tests.

  * Aligns the tests with the new expectations.

  * Adds more tests, integration ones in particular.

[0]: https://pypi.org/p/resolvelib
[1]: https://github.com/sarugaku/resolvelib
[2]: https://pradyunsg.me/blog/2020/03/27/pip-resolver-testing

Co-Authored-By: Jordan Borean <jborean93@gmail.com>
Co-Authored-By: Matt Clay <matt@mystile.com>
Co-Authored-By: Sam Doran <sdoran@redhat.com>
Co-Authored-By: Sloane Hertel <shertel@redhat.com>
Co-Authored-By: Sviatoslav Sydorenko <webknjaz@redhat.com>

Signed-Off-By: Sviatoslav Sydorenko <webknjaz@redhat.com>
4 years ago
.azure-pipelines Add Ubuntu 20.04 to CI and ansible-test (#69161) 4 years ago
.github Remove shippable.yml 4 years ago
bin Move ansible-test entry point. (#60281) 5 years ago
changelogs Replace the inhouse collection dependency resolver with `resolvelib` 4 years ago
docs Update porting guide for 2.10.6 4 years ago
examples rethink wording (#70028) 4 years ago
hacking Allow restricting config values to enumerated list (#73162) 4 years ago
lib/ansible Replace the inhouse collection dependency resolver with `resolvelib` 4 years ago
licenses Bundle a copy of github.com/nir0s/distro/distro.py 6 years ago
packaging Rename to ansible-core (#72594) 4 years ago
test Replace the inhouse collection dependency resolver with `resolvelib` 4 years ago
.cherry_picker.toml 🚸 🐍 🍒 ⛏ Integrate cherry picker (#41403) 6 years ago
.gitattributes 2.6 changelog gen/version/root dir cleanup (#40421) 7 years ago
.gitignore Add link to all module and plugin indexes (#72743) 4 years ago
.mailmap Fix syntax typo 7 years ago
COPYING license file should be in source tree 13 years ago
MANIFEST.in Add link to all module and plugin indexes (#72743) 4 years ago
Makefile Rename to ansible-core (#72594) 4 years ago
README.rst tiny grammatical edit (#73339) 4 years ago
requirements.txt Replace the inhouse collection dependency resolver with `resolvelib` 4 years ago
setup.py Declare support for Python 3.9 in the metadata 4 years ago

README.rst

|PyPI version| |Docs badge| |Chat badge| |Build Status| |Code Of Conduct| |Mailing Lists| |License| |CII Best Practices|

*******
Ansible
*******

Ansible is a radically simple IT automation system. It handles
configuration management, application deployment, cloud provisioning,
ad-hoc task execution, network automation, and multi-node orchestration. Ansible makes complex
changes like zero-downtime rolling updates with load balancers easy. More information on `the Ansible website <https://ansible.com/>`_.

Design Principles
=================

*  Have a dead-simple setup process with a minimal learning curve.
*  Manage machines very quickly and in parallel.
*  Avoid custom-agents and additional open ports, be agentless by
   leveraging the existing SSH daemon.
*  Describe infrastructure in a language that is both machine and human
   friendly.
*  Focus on security and easy auditability/review/rewriting of content.
*  Manage new remote machines instantly, without bootstrapping any
   software.
*  Allow module development in any dynamic language, not just Python.
*  Be usable as non-root.
*  Be the easiest IT automation system to use, ever.

Use Ansible
===========

You can install a released version of Ansible with ``pip`` or a package manager. See our
`installation guide <https://docs.ansible.com/ansible/latest/installation_guide/intro_installation.html>`_ for details on installing Ansible
on a variety of platforms.

Red Hat offers supported builds of `Ansible Engine <https://www.ansible.com/ansible-engine>`_.

Power users and developers can run the ``devel`` branch, which has the latest
features and fixes, directly. Although it is reasonably stable, you are more likely to encounter
breaking changes when running the ``devel`` branch. We recommend getting involved
in the Ansible community if you want to run the ``devel`` branch.

Get Involved
============

*  Read `Community
   Information <https://docs.ansible.com/ansible/latest/community>`_ for all
   kinds of ways to contribute to and interact with the project,
   including mailing list information and how to submit bug reports and
   code to Ansible.
*  Join a `Working Group
   <https://github.com/ansible/community/wiki>`_, an organized community devoted to a specific technology domain or platform.
*  Submit a proposed code update through a pull request to the ``devel`` branch.
*  Talk to us before making larger changes
   to avoid duplicate efforts. This not only helps everyone
   know what is going on, but it also helps save time and effort if we decide
   some changes are needed.
*  For a list of email lists, IRC channels and Working Groups, see the
   `Communication page <https://docs.ansible.com/ansible/latest/community/communication.html>`_

Coding Guidelines
=================

We document our Coding Guidelines in the `Developer Guide <https://docs.ansible.com/ansible/devel/dev_guide/>`_. We particularly suggest you review:

* `Contributing your module to Ansible <https://docs.ansible.com/ansible/devel/dev_guide/developing_modules_checklist.html>`_
* `Conventions, tips, and pitfalls <https://docs.ansible.com/ansible/devel/dev_guide/developing_modules_best_practices.html>`_

Branch Info
===========

*  The ``devel`` branch corresponds to the release actively under development.
*  The ``stable-2.X`` branches correspond to stable releases.
*  Create a branch based on ``devel`` and set up a `dev environment <https://docs.ansible.com/ansible/latest/dev_guide/developing_modules_general.html#common-environment-setup>`_ if you want to open a PR.
*  See the `Ansible release and maintenance <https://docs.ansible.com/ansible/devel/reference_appendices/release_and_maintenance.html>`_ page for information about active branches.

Roadmap
=======

Based on team and community feedback, an initial roadmap will be published for a major or minor version (ex: 2.7, 2.8).
The `Ansible Roadmap page <https://docs.ansible.com/ansible/devel/roadmap/>`_ details what is planned and how to influence the roadmap.

Authors
=======

Ansible was created by `Michael DeHaan <https://github.com/mpdehaan>`_
and has contributions from over 5000 users (and growing). Thanks everyone!

`Ansible <https://www.ansible.com>`_ is sponsored by `Red Hat, Inc.
<https://www.redhat.com>`_

License
=======

GNU General Public License v3.0 or later

See `COPYING <COPYING>`_ to see the full text.

.. |PyPI version| image:: https://img.shields.io/pypi/v/ansible-core.svg
   :target: https://pypi.org/project/ansible-core
.. |Docs badge| image:: https://img.shields.io/badge/docs-latest-brightgreen.svg
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   :target: https://dev.azure.com/ansible/ansible/_build/latest?definitionId=20&branchName=devel
.. |Chat badge| image:: https://img.shields.io/badge/chat-IRC-brightgreen.svg
   :target: https://docs.ansible.com/ansible/latest/community/communication.html
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   :target: https://docs.ansible.com/ansible/latest/community/code_of_conduct.html
   :alt: Ansible Code of Conduct
.. |Mailing Lists| image:: https://img.shields.io/badge/mailing%20lists-Ansible-orange.svg
   :target: https://docs.ansible.com/ansible/latest/community/communication.html#mailing-list-information
   :alt: Ansible mailing lists
.. |License| image:: https://img.shields.io/badge/license-GPL%20v3.0-brightgreen.svg
   :target: COPYING
   :alt: Repository License
.. |CII Best Practices| image:: https://bestpractices.coreinfrastructure.org/projects/2372/badge
   :target: https://bestpractices.coreinfrastructure.org/projects/2372
   :alt: Ansible CII Best Practices certification